Home / 12,864.47-17,753.64-7,198.86

Finding the Fourth Proportional to 12,864.47, 17,753.64 and 7,198.86

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Solution

The fourth proportional to 12,864.47, 17,753.64 and 7,198.86 is: 9,934.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,864.47 : 17,753.64 = 7,198.86 : x
  2. Step 2: Convert to fraction form
    12,864.47/17,753.64 = 7,198.86/x
  3. Step 3: Cross multiply
    12,864.47x = 17,753.64 × 7,198.86
  4. Step 4: Simplify right side
    12,864.47x = 127,805,968.85
  5. Step 5: Solve for x
    x = 127,805,968.85/12,864.47
  6. Step 6: Final answer
    x = 9,934.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.